In a conversation with Professor Adam Kanigowski, winner of the European Mathematical Society Prize, we explore the secrets of chaos theory and determinism. The professor explains how seemingly minor disturbances, known as the butterfly effect, can lead to radically different future scenarios. We discuss the mathematical possibilities of predicting phenomena such as weather or stock market movements, although the limits of measurement accuracy and the number of variables pose a huge challenge. The conversation also touches on philosophical questions—whether the future is already written, and how chaos theory can change our understanding of evolution and everyday decisions.